CVE-2023-54357: Joomla com_booking component 2.4.9 contains an information disclosure vulnerability that allows unauthenticate

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2023-54357 is a high-severity flaw (CVSS 7.5) affecting book it\!. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Joomla com_booking component 2.4.9 contains an information disclosure vulnerability that allows unauthenticated attackers to enumerate user accounts by exploiting the getUserData function in the customer controller. Attackers can send GET requests to index.php with option=com_booking, controller=customer, task=getUserData, and an id parameter to retrieve user names, usernames, and email addresses through brute force enumeration.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 49%)
CISA exploited list	No
Weakness	CWE-203
Published	2026-06-19
Last modified	2026-10-28

Publisher (CNA): VulnCheck · Vendor: artio

Last updated 2026-10-28 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-19 19:16 UTCPublished CVE record published
2026-10-28 19:10 UTCUpdated Record last modified

artio book it\! DOWNGRADE

Affected: 2.4.9

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.4.9

1. Check installed version

apt-cache policy book-it || rpm -q book-it || book-it --version

2. No fixed release: DOWNGRADE to a release before 2.4.9 (Debian / Ubuntu)

apt-cache madison book-it sudo apt install book-it=<VERSION_BEFORE_2.4.9> sudo apt-mark hold book-it

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list book-it sudo dnf downgrade book-it-<VERSION_BEFORE_2.4.9> sudo dnf versionlock add book-it

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-54357?

book it\!: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-54357 being exploited?

CVE-2023-54357 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-54357 affect?

CVE-2023-54357 affects book it\!. Severity is high (CVSS 7.5). Joomla com_booking component 2.4.9 contains an information disclosure vulnerability that allows unauthenticated attackers to enumerate user accounts by exploiting the getUserData function in the customer controller. Attackers can send GET r

How urgent is CVE-2023-54357?

Priority 49/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Joomla vulnerabilities · PHP vulnerabilities

References

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